So the link to this military contractor's death to ISIS is very tenuous. This has to be established first, and there is almost nothing to establish it on - he was a Jordanian police officer, not an ISIS militant. Then you have to say Twitter is engaged in running afoul of material support of terrorism laws. These laws generally would mean something along the lines of that in some back office of Twitter, Jack Dorsey was storing up Kalashnikov rifles which he was going to ship to the Taliban in order to assault American bases there.
In 1929, the Republican (!) Secretary of State rolled up all the old World War I spying operations saying "Gentlemen do not read each other's mail". How far the US has fallen in freedom from the day Stimson uttered those words a century ago.